The ##color(red)(2):color(blue)(3)## mole ratio will be equivalent to a ##149.1 : 96.0## gram ratio, i.e. you get ##"96.0 g"## of oxygen gas for every ##"149.1 g"## of potassium chloride produced by the reaction.

This means that ##"20.3 g"## of potassium chloride would correspond to